Furnace-roof.



No; 862,835. PATENTED MAY '7, 1907] F. D. H'ALSTEAD & L. c. ANDREWS.

FURNACE ROOF.

APPLICATION rILBp JAN. 31. 1907.

FRANCIS HALSTEAD AND LEON o. ANDREWS, or men HAVEN, PENNSYLVANIA.

FURNACE-ROOF.

Application filed January 31, 1907. Serial No. 355,115.

material, and embodying such a construction that the refractory material is held under yielding pressure in proper position reletne to the metal this in order to compensate for unequal expansion; and contract-ion ofthe metal and refrnctorymaterisl so as to prolong the usefulness of the latter, end else to hold the refractory material in place sndprevent the entire arch thereof from falling when the sections of refractory material w or away either bynieltin g or chipping off.

Another object of the invention is the provision of a furnace root constructedfin such, a.

manner that it maybe expeditiously and easily relined with rel'rectory muterial when necessity demands so as to prolong its useful ness zis e wholefor en indefinite period.

Other advantageous characteristics p'cculiar to our invention will befully understood l'rom the following description and v claims when the some are read in connection with the ecccnnpruiyiug drawings, forming part of this specification, in which:

Figure l is enelevntio n of'a. portion'pt' a furnace roof constructed in accordance with our in'vention. Fig. 2 is n detail plan view of one end ofthc said roof portion. Fig. 3 is an elevation of the outer side of one of the chunps ol' the roof portion. Fig. i is :1 trainsvorsc section taken in. the phrne indicated by the line l--*l of Fig. 1.

Similar letters designate corresponding parts in all of the viewsol' the drawings, referring to which:

A is the metal frame or bung of our novel l urnnce roof portion. hung is prefer.-|hl though not necessarily, of I-fonn in cross-section. Fig. 4, and provided ntils ends ,n'ith nperfured reduced portions a on which are upwardly extending nlnrtlnonts or shoulders I).

Bis the refractorynmterizil of the roof portion, which is preferably made up of a plu- Specification of Letters Patent.

furnace roofs The said frame or.

Patented. May 7, 1907.

relity of bricks 0 arranged side by side and disposed under the frame or bung A throughwhich have for their oflice to hold the refractory materiel B in proper position relative to the frame or bung A. The said clamps C ere provided with apertured lugs (Z to receive bolts e through the medium of which they are connected in a hinged manner to the reduced ends aof the frame or bung A; and they are 7 also provided in their upper arms j" with ep ertures g and h h, as best shown in Fig. I For the sake of lending strength to the said clamps C they are referably provided with ribs t on their bac 's as also best shown in Fi 3.

T) D are devices through the medium of which the lower arms of the clamps C are held under yielding pressure against the ends of the refractory material B. These devices D are identical in construction, sndtherefore a detailed description of the one shown in Fig. ZWV'lll suflice to impsirt a. definite un' Fig. 2, comprises headed and threaded bolts out the length thereof, and C C are the clamps 'derstanding of both. The said device D;

m extending outward through the apertures 8o h of. the clamp C, an abutment n. loosely receiving the outer portions of boltsvm end hsving'la centrzil aperture, nuts 1) mounted 'on the threznl'ed portions of the bolts at the;

outer side of the abutment. 17; an endvvise movable rod 1" extending loosely through the;

'aperture in the abutment n and the aperture 9 1n chm-nip C and arranged to bpnr st rts inner;

end against then-nine abutment l), and havingan enlnrgennints' at an intern'iediato' 0 point of its length, and n coiled spring t surrounding the rod r and interposed between the enlargements thereof and the adjustable abutment 11.. The said spring serves to hold the rod 1* under yielding against the shoulder or abutment of the frame or bung A, and by adjusting the abuts ment :1 the tension of the spring t may be regulated n's occasion demands.

ll virtue of the devices D being eonstruct- [00 ed and arranged relative to the frame- A and chimps in the nmnner illustrated. and do seribed, it. will be apparent that the rods r held under yielding pressure against the serve to yieldingly press the lower arms of the clamps inward so as to enable snid lower arms to yieldingly hold between them the I shoulders or obutments b of frame A will log,-

. and further,'tha t the will take up or com pensate for wear of the 'With the upper bricks c of refractory material. will also be apparent that the spring-pressed clamps C will allow for unequal expansion and contraction of the metal frame A and refractory material ll and tightly hold the bricks of refractory spring-pressed clamps bricks c and in that way tight] y hold the refractory material notwithstanding such wear. It will further be ap 'ireeiated from the foregoing than when the refractory material B is worn away to a considerable extent, the

clamps C permit of the said refractory mate-- rial being expeditiously and easily removed and as readily replaced with new refractory material so as to materially prolong the usefulness of the roof portion as a whole.

We prefer to employ the devices D for holding the clamps C yielding] y against the refractory material, but we do not desire to be understood as the said devices D or to any specific arrangement of springs for accomplishing such purpose, inasmuch as the clam s C may be yieldingly held against the re ractory material in any approved manner Without in- Volving departure from the scope of our invention as defined in the appended claims.

In addition to the practicaladvantages hereinbefore ascribed to ournovel furnace roof or roof portion, it will be noted that the said roof or roof portion is simple, ineXpen-' sive and compact. in construction, and that its metallic elements are well, adapted tov withstand the usage are ordinarily subjected to which furnace roofs Having described our invention, ,what we clalm and desire to secured) y Letters'Patent, 1s: v

' 1. In a furnace roof, thecombination of a metallic frame, clamps connected at an intermediate point of their length. in a hinged manner to the frame and having lower arms arran 'ed to receive and hold refractory inat'erial between them, and springs cooperating arms of the clampsfor holdl'naterial at all times;

confining ourselves to l l l upper arms of theclanips, rods through said upper arms of the clamps and ing the lower arms thereof under yielding pressure against the refractory material.

2. Ina furnace'roof the combination of an arched metallic'frame, bricks of refractory material arranged in an arched manner against the under side of the frame, clamps connected at an intermediate point of their length in a hinged manner to the frame and having lower arms to hold the bricks, and s )rin s cooperating with the upper arms of the 0 amps to press the lower arms thereof against the bricks. Y

3. In a furnace roof, the combination of a metallic frame, bricks of refractory material arranged against the under side of the frame. clamps connected at an intermediate point of their length in-a hinged mannerto the frame and having lower arms for exerting pressure against the bricks, abutments carried by the movable arranged-to bear-against the frame, and springs interposed between the abutments and the said rods.

4. In afurnace ro of, the-combination of a metallic frame, bricks of refractory material arranged against the under side of the frame, clamps connected at an intermediate point of their length in aJhinged manner to'thc frame and having lower BJII'IS for exerting pressure'against the bricks, threaded extending outward from the upper arms of the clamps, abutment-s movable on said bolts, nuts mounted on the bolts back of the .abutments, rods guided inthe upper arms of the clamps and arranged to bear against theframe, and springs interposed between theabutme'nts and said rods.

In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

i FRANCIS D. l-IALS'IEAD.

LEON C. ANDREWS.

l/Vitnesses C. E. HEL'I AN, C. W. KELLER. 

